Narrative:Western Air Lines Flight 34 departed from Salt Lake City (SLC) at 08:50. The Convair proceeded IFR to Rapid City Regional Airport, SD (RAP). The flight reported as being over the Wright intersection at 10:25, at 17,000 feet, estimating Rapid City at 10:50. Weather conditions in the area probably included moderate to heavy icing and moderate to severe turbulence. The Convair suddenly entered a rapid descent and struck the ground at high speed.

Probable Cause:

PROBABLE CAUSE: "A sudden emergency of undetermined origin under adverse weather conditions resulting in rapid descent and impact with the ground at high speed."

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path. Distance from Salt Lake City International Airport, UT to Rapid City Regional Airport, SD as the crow flies is 811 km (507 miles).Accident location: Approximate; accuracy within a few kilometers.